Using near infrared spectroscopy NIRS for rapid determination of oil content in dried oil palm mesocarp

Yong Yit Yuan, . and Silalahi Divo D., . and Caliman Jean P., . and Sudarno, . and Davrieux F., . (2017) Using near infrared spectroscopy NIRS for rapid determination of oil content in dried oil palm mesocarp. [Proceedings Paper]

The bunch analysis technique is widely used for studying bunch and fruit traits of oil palm frees by oil palm breeders. The bunch analysis method as first proposed by Blaak et. al. 1963 has been reviewed many times over the years but remained basically the same with minor modifications especially in the sub-sampling procedures. The whole procedure is laborious and time-consuming. One of the important stages of bunch analysis is the oil content determination which is traditionally conducted using Soxhlet extraction method. Due to the toxicity and harmfulness of N-Hexane as employed in the Soxhlet oil extraction procedure an alternative method more environment-friendly and rapid will be most welcomed by oil palm breeders. In this paper we share our experience in the development and employment of near infrared reflectance spectroscopy NIRS for rapid high accuracy precision and minimal chemical risk method for the determination of oil content of dried oil palm mesocarp. A total of 2 891samples were collected during four years 2013 to 2016. The oil content of each sample was determined by the conventional Soxhlet extraction method and correspondingly its corresponding NIRS reflectance obtained by scanning using NIRS instrument XDS -FOSS. Samples of varying oil contents ranging from 1.3 and 88.0 on dry matter basis were used. These data were further analysed and processed chemometrically to develop and test various calibration models. By using modified partial least square MPLS regression data sets of each year 2013 2014 and 2015 and its combination were used to generate four calibration models i.e. K-13 K-14 K-15 and K-13-14-15. For model assessment external validation was conducted using samples of 2016. Oil contents of validation samples determined by Soxhlet extraction and those generated by NIRS calibration models were compared and studied statistically. The results showed that the model generated from the combination data sets K-13-14-15 provided the best fit with r 0.977 SEP 1.42 and RPDp 6.27. The correlation between reference and predicted values of validation samples were in agreement with high linearity accuracy and robustness. The results demonstrated that NIR spectroscopy can be used as an alternative. rapid and reliable technique to estimate the oil content in the mesocarp. NIRS is being routinely used in our bunch analysis laboratory as an alternative to the Soxhlet oil extraction method which is currently being employed in most bunch analysis laboratories.

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Abstract

The bunch analysis technique is widely used for studying bunch and fruit traits of oil palm frees by oil palm breeders. The bunch analysis method as first proposed by Blaak et. al. 1963 has been reviewed many times over the years but remained basically the same with minor modifications especially in the sub-sampling procedures. The whole procedure is laborious and time-consuming. One of the important stages of bunch analysis is the oil content determination which is traditionally conducted using Soxhlet extraction method. Due to the toxicity and harmfulness of N-Hexane as employed in the Soxhlet oil extraction procedure an alternative method more environment-friendly and rapid will be most welcomed by oil palm breeders. In this paper we share our experience in the development and employment of near infrared reflectance spectroscopy NIRS for rapid high accuracy precision and minimal chemical risk method for the determination of oil content of dried oil palm mesocarp. A total of 2 891samples were collected during four years 2013 to 2016. The oil content of each sample was determined by the conventional Soxhlet extraction method and correspondingly its corresponding NIRS reflectance obtained by scanning using NIRS instrument XDS -FOSS. Samples of varying oil contents ranging from 1.3 and 88.0 on dry matter basis were used. These data were further analysed and processed chemometrically to develop and test various calibration models. By using modified partial least square MPLS regression data sets of each year 2013 2014 and 2015 and its combination were used to generate four calibration models i.e. K-13 K-14 K-15 and K-13-14-15. For model assessment external validation was conducted using samples of 2016. Oil contents of validation samples determined by Soxhlet extraction and those generated by NIRS calibration models were compared and studied statistically. The results showed that the model generated from the combination data sets K-13-14-15 provided the best fit with r 0.977 SEP 1.42 and RPDp 6.27. The correlation between reference and predicted values of validation samples were in agreement with high linearity accuracy and robustness. The results demonstrated that NIR spectroscopy can be used as an alternative. rapid and reliable technique to estimate the oil content in the mesocarp. NIRS is being routinely used in our bunch analysis laboratory as an alternative to the Soxhlet oil extraction method which is currently being employed in most bunch analysis laboratories.

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. SB299 P3I61 2017 Call Number.
AGROVOC Term:	Oil palm
AGROVOC Term:	Oil content
AGROVOC Term:	Identification
AGROVOC Term:	Prediction
AGROVOC Term:	Near infrared spectroscopy
AGROVOC Term:	Mesocarp
AGROVOC Term:	Calibration
AGROVOC Term:	Fruit extracts
AGROVOC Term:	Palm oils
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:15
URI:	http://webagris.upm.edu.my/id/eprint/13108

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